alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Bladabindi/njRAT CnC Command (ll)"; flow:established,to_server; dsize:<350; content:"|00|ll"; depth:8; fast_pattern; content:"Win|20|"; distance:0; pcre:"/^\d{1,5}\x00ll/i"; reference:md5,ac7b1fdc679fdbd3cb0cd8a3e30ecddb; classtype:command-and-control; sid:2021176; rev:6; metadata:created_at 2015_06_02, confidence Medium, signature_severity Major, updated_at 2022_05_03;)